Ebay Issues

i put a bid on a guitar for 1,00 Euro and now im the winning bidder (not yet, but in some days...). this guys ebay page says sell or trade so i wanna buy. but now this guy says if i want to trade it for sumthin, and i say no, i only wanna buy it. and he says that he wont sell it for 1 euro, but if he puts it in ebay for that price, i won and he dont want to sell it, even if he says sell or trade, can i do something to buy it? cause if he finally dont sell it to me, can i email ebay and tell them to do something or not?